Ueki recieves an invitation to a "party" held by Robert Haydn. So, Ueki, Rinko, Inumaru and Mori all go to an arcade that leads to Robert's underground theme park called Dogura Mansion. There, Ueki fights in the first round against Yun-Pao, one of the new members of Robert's Ten.

Ueki continues his battle with Yun-Pao, still trying to figure out Yun-Pao's limit. Later, in the next fight, Mori finds herself battling on the Cossack Field against Kabara, a member of Robert's 10 and a notorious hunter known in the underworld.

It's Rinko vs. Kabara, and they fight in the...cat field? The objective is to get the opponent to get eaten by a cat, and to do that, they have to turn into a mouse! Slap the cat's nose and they become a mouse! Kabara seems to have the advantage in this one thanks to his ability to fly, but Rinko has a few tricks up her sleeves: some new weapons and a...love of animals?